Assi-jstok



6 2 5 6. l .u on` T. J. COSTELLO PAIR HEATING FURNACE AND METHOD OF `HEAT TREATING MATERAL origina] Filed Oo'c.4 50, 1920 4 sheis-sheef Jan. 11 1927. Y I T. -J. COSTELLO PAIR HEATING FURNACE AND METHOD OF HEAT TREATING MATERIAL origina] Filed oct. so, 1920 4 sheetssheet 3 INVENTOR Jan. 11, 1927.

T. J. cosTEgLo PAIRYHEATING FURNACE AND METHOD OF HEAT TREATING MATERIAL original Filed Octo. 1920 sheets-sheet .1

INVENTOR u. l I

.-Reissue'cl l 11, 1927.v

enfrenteloRA'rIoN or PENNSYLVANIA.

' MENTS, TO GDB :PAIRHEA'ING FURNACE AND METHOD OF HEAT-TRETING MTEHEAL.

Original No. 1,447,583, dated Karene, 1923, Serial No. 420,593, filed october 3D, 1920. Apnlcaton for reissue filed June 25, 1926.

The present invention has relation lironth ly to heating furnaces, and more particular`- ly to pair-heating furnaces for heating sheet y .15 of the material beine' heetedi and netcrehlr in etlectise lient relationshipte the materiel, Con eni L tiyfne conto-notion rmt he ch ,the ne material terms the .cent fines in such inine sitios ot 'the materiel that the :ipnosi clined position whereby toppling offer of the heating hars or sie is is prevented enti the passage ot heat between adjacent oars or sinne incilitntetl.

A still tnrther object of the invention is to utilize the -projections formed on the material during shearing as separating ineensI or spacers for adjacent thicknesses thereof.

An additional object of the invention is to decrease the period required for heat penetration ot the material undergoing treatment.v

The foregoing and othei` objects, together with their attendant advantages, will, be. apparent as the invention becomes better understood by reference to the accompanying specificatie l and drawings forming e. part there-or, it heing premised that chai he meile in the varion details and lne nienner ot oilcreticn fthe scone of t lziims without ciegzirtini nn t ie invention.

h Igure l. is n horizontal longitntlinnl se@ tion of n 'tnt-nece embodying iny intention, Figure a longitudinal vertical section on the line ll-I-ll of liig'ufre l Figure is a transversevertical seetion lirectiy entzgectetl to the combustion,

object ot the inve; fion ie nnuntain ie' material being heated in 1n- Serial No. $8,575.

' modified forni of skid,

Figure S is a transverse sectional vView corresponding to Figure 3 enti illnstrntmg a slightly niorhiietl form oi furnace., enti D t L -l Referring; more particni ingsi there ie illustrated e. :o her 2, enti n. heating chain iieiiiifr iur; c oith. t floor lient h of the. he.

provitlcl with e. itlewey ,ir mateto he heet-eci, this elitlen-'ey preferably vbeing i-c ,nieo by Waterfooletl skids. In 'the forni of intention illust l in .Figures 5 .enti o, each ol these elicls ce rieee. en outer pipe et :intl an pipe 5, ie letter heving :in inlet i5 end the 'former an outlet 7, the two pipe: being; so that the 'incoming water is discharged from the inner pipe into the outer pipe itt a point well towards its end remote from the combustion chamber, while the outgoing Water is taken ott at lthe opposite end thereof. Preferably each skid will be provided at its delivery end vwith a solid non-cooled portion 8.

In the form illustrated in Figure 7, the

'skid consists of en outer pipe 9 anni an in,

11er pipe l0 extending therethrough, Water lcirctletetl continnonsiy through the inner pipe ont not passing ont around such i iielile specers il are provided for their spaced across which the here or slabs A to he lientn cil lie when sopported on the vslticls. The products ot corn'lfnistionr troni thecombustion All chamber 2 pass out into the heating chamber 3 endthence directly over the tops of the bars or slabs, the major portion of the products passing to the discharge end ot' such chamber where they downwardly through the central opening 13, which com munieutcs with one end of the'open-top iiue 12, seid opening heing formed et the end of e. baille plate lll. This baille plete is prefer-4 ably et u. somewhat lower level than the udjacent floor of the chamber 3. The remainportion. of the products of combustion are drawn between the adjacent feces ot' the hars or siehe te directly heat the Same' es shown by the uri-uws in Figure 4, and es will be more particularly pointed out hereinritter.

The heated in passing haclnvzird through the tine l@ nrentilized hy direct contact 'with the under sides of the here. er siehe to further heet the same und thereby give n more tu'iitorm heating action, es well es utilizing considerehle heet which would otherwise to the steelt and be lost. At the receiving end ont the furnace the Weste gases diverge laterally7 shown by the dotted arrows in Figure l, and again pass to- 'n'urd the delivery end of the furnace through the side fines 15, one of these lines being urriiingeu on each side of the open-top flue ln pf. ing through these side fines, the. vininut still further heet to the iloeror hearth of the chamber before esenping therefrom into the stuck 1G.

Any usual or suit-utile 'pusher device i7 may he provided tot pushing the here or slabs A to he heated into und through the heating chamber oit the furnace, the pusher being formed with u sloping face for innintaining the material. in inclined position. A suitable door 1S with actuating mechanism liz) therefor is utilized for closing the en-A rrance te the heating chamber. 'l'he door i8 ie shown es being in the form of u hooked erm 20, pivote-d :it 2%.., und adapted to teli hy gravity into engagement with the outer1 moet bei or ,slab and hold the suine ut the inclination given hy the pusher il` The lower face of the hooked erin beveled so that :is the hete or slain; are pushed there-- under hy the tion et' the pusher, ti umn will readily nime uj'nverdl" und permit the passen@ thm-cot'. lininedii l,l thereafter the erin will drop downwardly to ifutch the inst bar or elah, as clearly ehown in Figures 2 and 4, and mei *1in the entire series thereof in inclined relation The or slabs ere illustrated ne hein on edge in e continuous manner, the tion preventing the leading bars or sie. ten toppiing over and of Contact between th ..d the more pnrticrdnriy to .Figures und 9, it will he noted that the hurrs provided with u retaining device which 1eme formed during the shearing operation are utihzcd 'for separating or spacing adjacent pieces: ot' niaterial to provide narrow pussages 2li therebetween, these passages per-- .In Figure 8 there is illustrated a slightly modified term et' furnace in which parts corresponflinc are desig, cited by the sinne reference characters having n prime etlixed thereto. In this form of fumece the side iues are eliminated und the waste gases pass from the open-top Hue l2 into an underlying flue 25, which 'passes to the steel;

IThe method disclosed herein is disclosed and claimed. in my Patent No., 1,530,239, grunted Feeri'lary lll, 10525.

The advantages.; et the invenion'will be apparent to thoeefamilinr with the opel zillion of turnuees of this character, since, by reason ot' the entre passes given the products ot cembusl en they are prevented from going to the steelt until their temperature hes been greatly reduced end e large amount of their effective heut utilized. Further advantages arise from the method of passing the nemici-inl through the furnace in inclined position end causing it to form a division will between adjacent flues.

l claire. y 'i L A. heating furnace having its heating chamber provided With a slideway and an open-top flue formed. in the'loo'r of seid chamber betreuen the members of Suid slideway, seid flue heving continuous closed sides and having coin'uiuncetion et lone end with the interior 'ofthe heating chamber and et its lother end communicating 'with unoutlet time, seid outlet flue extending longitudinally ot these passages,

to the perte already `described below the floor of the heating chamber, sub* v the combustion chamber, and an outlet Hue.

commun ng with the opentop flue at the combustion chamber end of the tnrnece, subetentmllv as described. Y

. the billets, su

. top flue forme 'either side ofthe op the charging end of the heating chamber,`

means for supporting the billets to be heated transversely of said Hue und exposed at their under sidev to the heatino action thereof. and means for circulating the products of combastion through said lue'y after 'they have passed throu lrthe heating chamber above stantially as described. 4.y A heating furnace having a longitudinally extendinor heating chamber, an openin the floor chamber longitudinally thereof, means for supporting the billets to be heated transversely across said flue, and. return finesalso formed in the floor of said chamber, one at en-top dus, the latter having communication With the heating chamber at one end and with the return flues at the opposite end, substantiallyV as described. 5. A heating furnace having its heating -chamber fformed with an open-top flue,

means for supporting the material to be heated above said flue, and meansv for caus- .ing a heating medium t`o flow over the material so supported in lthe direction of travel therethrough, and then to flow back through said flue in contact with the under side of saidl material, substantiallyas described..

6. A heating furnace having its heating chamber formed with an open-top flue, means for supportin the material to be Yheated-,above said ue and transversely thereof, and means for causinga heating medium'to How over the materiel so sup ported in the direction of travel therethrough and then to flow back through said flue in Contact with the under side` of said material, substantially as described.

7. A heating furnace having its 'heating `chamber formed with an open-top flue,

means for supportinfr the bars o r slabs to be heated in inclined eA gewise positions trans'- versely across the top of said flue, and means 69 forfirst passing the heatinfr medium above said bars or slabs and for sdbsequently passing the same heating medium below said bars or slabs in contact with the lower sides thereof, substantially Vas described.

8. A heating furnace having its heating chamber v'formed with an open-top flue, means for supporting the material to be heated above said flue, in inclined edgewise position, und meansy for passing a heating medium above and below said material in opposite directions, substantially as de scribed.

9. A heating furnace having its heating chamber formed with anoperrtop flue, and means for supporting the material to be longitudinally in i heat conducting relationship stantially as describe@ of the heating".

transversely across the top of heated above said; in inclinedposition and preventing the same from toppling `:then supper scribed.

l0. A. 'pair heating `furnace having` its heating chamber formed with a heating flue, means forrsupporting the n'iaterial to be heated above said fine, and means for causing a heating medium to ioiv over the mates. rial so supported in the direction of travel of auchl material and then 'to flow back through saidflue below the materialand in 1].. .A pairV heating furnace .having its heating chamber formed with. a heating time, means for supportin the material lto bel heated above said me and transversely hhreo means causing a heating 'medium to dow over the material so supported in the direction ofjtravel of the material through the heating chamber, and then to .dow back through sait iiue below the mw teriai and vin'heat conducting relationship thereto, substantially described.

12. A pair heating furnace having its heatin chamber formed .ivith substantially centra ly located longitudinali extending Ltlue, means for supporting 'the ars or slabs to be heated. in inclined edgewise position the flue, and means for first passing the heating medium above said bars or slabs and for subsequently passing the same heating medium below the bars or slabs and in heat conducting relas tionship thereto, substantially as described. 13. A air heating furnace having its heating cliamber formed with a longitudinally extending heating liuc in the base of the furnace, means for supporting the material to be heated above said flue and transversely thereof. and means for passing a heating medium above and below said material in opposite directions, the heating medium passing above said material in the direction of travel of the material throu h the heating chamber, substantially as e-4 scribed.A l

14. A pair heating furnace .having its heating chamberv formed 'with a longitudinally extending heating Hue in the floor thereof, substantiallyv closed sides for said. flue, means for supporting the material to be heated above said flue and transversely thereof, and means .for directlyl passing .a heating-medium above and below said material in opposite directions, said line commu-.- nicating with the heating chamber intermediste said supporting means and beyond the end of the material siipported. thereby' substantially as described.

ih A pair heatingy furnace having` its heating chamber formed with a long fiftudiH nelly extending heating flue, means for su porting the material to be heated aboveA said ted fen edge, siibstantially as dethereto, sub- W al 55 gases ahw im shet mars in f beleaix. the hearthn heating relation ibase' l l?) L A air hgaiing furnace hif'nj skids I "which a row of sheet bins c rgged ino .the furnace and supported themin, a hearth receiving the sheet: bars s ami from' which hey are drawn imm. #he uzi-ce, and means fm eading heang hbove and along he row mf suet baars :from the'.

den 

